French > Conversational French prevalence:
Percentage of people in each EU country who are not French native speakers, who claimed in a survey to be able to speak French well enough to hold a conversation.

German > Conversational German prevalence:
Percentage of people in each EU country who are not German native speakers, who claimed in a survey to be able to speak German well enough to hold a conversation.

Polish > Conversational Polish prevalence:
Percentage of people in each EU country who are not Polish native speakers, who claimed in a survey to be able to speak Polish well enough to hold a conversation.